Which of the Following Statements Is Correct When There Are

Which of the following statements is correct when there are two authors for a publication?

A) All authors are listed for every reference.
B) All authors are listed for the first reference and the first author's last name followed by et al.is listed for subsequent references.
C) The first author's last name followed by et al.is listed for all references.
D) The first and second author's last name is listed for all references.